6nlr

Crystal structure of the putative histidinol phosphatase hisK from Listeria monocytogenes with trinuclear metals determined by PIXE revealing sulphate ion in active site. Based on PIXE analysis and original date from 3DCP

spinqualitylabelsall models 6nlr, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6nlr is a 3 chain structure with sequence from Listeria monocytogenes serotype 4b str. H7858. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.1Å Ligands: CA, CO, FE, MN, MSE, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Metalloproteins comprise over one-third of proteins, with approximately half of all enzymes requiring metal to function. Accurate identification of these metal atoms and their environment is a prerequisite to understanding biological mechanism. Using ion beam analysis through particle induced X-ray emission (PIXE), we have quantitatively identified the metal atoms in 30 previously structurally characterized proteins using minimal sample volume and a high-throughput approach. Over half of these metals had been misidentified in the deposited structural models. Some of the PIXE detected metals not seen in the models were explainable as artifacts from promiscuous crystallization reagents. For others, using the correct metal improved the structural models. For multinuclear sites, anomalous diffraction signals enabled the positioning of the correct metals to reveal previously obscured biological information. PIXE is insensitive to the chemical environment, but coupled with experimental diffraction data deposited alongside the structural model it enables validation and potential remediation of metalloprotein models, improving structural and, more importantly, mechanistic knowledge. High-Throughput PIXE as an Essential Quantitative Assay for Accurate Metalloprotein Structural Analysis: Development and Application.,Grime GW, Zeldin OB, Snell ME, Lowe ED, Hunt JF, Montelione GT, Tong L, Snell EH, Garman EF J Am Chem Soc. 2019 Dec 20. doi: 10.1021/jacs.9b09186. PMID:31794207 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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